Speed attachment for gas-engines.



' No. 784,917. EATENTED MAE. 1A, 1905. A. BUGEEEE A; E. E MACEUEE.

SPEED ATTACHMENT EOE GAS ENGTNES.

APPLICATION FILED AUG. 6, 1902.

2 SHEETS-SHEET l.

fag /01 ma/@ PATENTED MAR. 14, 190.5.- A. BUGHNER & E. P. MCCLURE. SPEED ATTACHMENT POR GAS ENGINES.

APPLICATION FILED AUG. 6, 1902.

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Invenar x @be UNITED STATES- Patented March 14, 1905.

PATENT OFFICE.

SPEED ATTACHMENT FOR GAS-ENGINES.

SPECIFICATION forming part of Letters Patent No. 784,917, dated March 14, 1905.

Application led August 6, 1902. Serial No. 118,560.

To nl?, whom it may concern:

Be it known that we, ALBERT BUCHNER and ELMER I). MCCLURE, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Speed Attachments for Gas-Engines; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in gas or vapor engines, and has for its object to provide a simple and convenient attachment for quickly increasing the power and speed of a motor-engine over that of the normal working controlled by the automatic governor.

It will loe readily understood that this improvement is an auxiliary attachment working in unison with the governor, which continuously controls the uniform speed of the motor no matter whether the attachment is in or out of its working position.

This attachment is more especially intended for use on the type of motors shown in our pending application, Serial No. 98,941, and also illustrated in this application, and showing the relative position of the improved feature and the governor proper.

1t is not necessary that this attachment be placed on all motors or engines used in factories or shops for ordinary power purposes, as the governor proper controls and regulates the varying demand for more or less power up to its fixed limit. Then the motor is applied to an automobile or similar vehicle, this auxiliary speed and power controlling attachment is made a part thereof and affords means for suddenly increasing the speed in avoiding accidents, for racing purposes, or for climbing hills.

In the drawings, Figure 1 is an elevation and part section of a motor embodying the improved features. Fig. 2 is a vertical section on line Q, Fig. l, looking' in the direction indicated by the arrow. Fig. 3 is a vertical section on line 3, Fig. 2. Fig. L1 is a broken-away detail. Fig. 5 is a vertical section on line Fig. 6; and Fig. 6 is a horizontal section on line 6, Fig. 5.

A complete engine is illustrated in the drawings; but the description will be confined to the improved features and the parts affected thereby.

A represents the cylinder; B, the piston; C, the crank-shaft; D, the crank; E, the chambered base inclosing the crank-chamber, and F the companion iiy-wheels.

'The governor proper is of precisely the same construction and operation as that set forth in the application herein referred to and comprises an integral structure consisting of the weight part 7, the companion web projections 8, and the segmental cam 9, supported on the web ends, as shown in Fig. 2. The centrifugally -acting governorweight 7 is mounted on the crank-arm 1() and has a limited sliding movement thereon in both an outward and inward longitudinal direction in regulating the uniform speed of the engine. A pin 11 is inserted in the inner side of the cam part and extends toward the center and stops 'short of a corresponding pin l2, loosely seated in the crank-arm 1() and crank-shaft, as best shown in Fig. 3. A governor-spring 13 is mounted on these pins, the respective ends of which have a bearing against the inner side of the cam and on the shoulder 14, formed on the loose pin 1Q. In this arrangement the centrifugal action when the engine is in motion draws the governor-weight outward and compresses the spring and increases the tension as the speed increases and pulls inwardly as the speed diminishes and returns the weight to its normal position as the engine comes to a stop.

The piston is of the usual construction and has a valve-stem l5 inserted longitudinally therethrough, with a valve 1G mounted on the inner or upper end thereof, which back-seats downwardly in closing the passage 17, opening into the cylinder through the head end of the piston for the admission of the explosive charge. The lower disengaged end of the valve-stem is adapted to have an intermittent contact with the governor segmental camplate and the valve opened at the proper time to admit the motive charge into the explosive chamber of the cylinder. This is the operation under the arrangement set forth in the IOO pending application before referred to. The auxiliary attachment, which is the subjectmatter of this application, for temporarily increasing the speed and power over that of the normal conditions will be next described.

The lower end of the loose spring tensionpin 12 is spherical or rounded, as at a, and rests in position to be engaged by the beveled or wedge end 18 of a rod 19, inserted longitudinally through the crank-shaft from one end thereof. This rod is provided with a slot 20 for the loose engagement of a pin 21, which allows for a longitudinal movement, but prevents it from turning around independent from the crank-shaft, so that the beveled end is always in position to engage the spherical end of the pin 12. The lower fulcrum end of a hand-lever 22 is attached to a standard or bracket 23 by a pivot-bolt 24. At the point of engagement with the rod 19 the hand-lever is bifurcated and passes by each side of the lever with an intervening space 25. The end of the rod occupying' this space is provided with an annular groove 26 for the loose frictional engagement of the companion pins 27, projecting from the inner side of the lever. The handle end of the lever is adapted to be moved back and forth across the face of a quadrant-bar 28 and to engage with any one of the notches 29 therein in locking the lever at any desired point in accordance with the speed to be maintained. permits of the rod 19 rotating with the crankshaft and provides for a longitudinal movement thereof by hand when it is necessary to increase the speed of the motor for the time being in cases of emergency. This is done by shifting the handle end of the lever inward, which imparts a corresponding endwise movement to the rod 19 and projects the inner wedge end under the pin 12 and forces the same upward, which has the effect of suddenly compressing the spring and increasing` the tension thereof independent from that of the governor proper and raises the valve-stem higher and causes the valve to open wider and admita greater volume of the explosive charge at each impulse. Moving the hand-lever in the opposite direction retracts the rod and releases the 'wedge end from engagement with the tension-pin 12 and restores the motor to This arrangemen tv its normal running condition under control of the centrifugal governor. The stuffing-box SO prevents the escape of any of the explosive mixture from the crank-chamber around the rod 19.

It will be understood that ordinarily the action of the governor proper is suiiicient for all requirements, the attachment for manually and temporarily changing and controlling the speed being more especially intended for use in emergencies.

The motive agent enters the crank-chamber 31 through a pipe 32 and is exhausted from the cylinder through pipe 33.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is-

1. In a motor of the class described, an auX- iliary attachment for controlling the speed, comprising a rod inserted longitudinally in the crank-shaft and having its inner end beveled, means for manually imparting an endwise movement to said rod, a governor-weight provided with a cam-plate, a tension-pin inserted between said weight and cam-plate and in position to be engaged by the beveled end of said rod, a spring mounted on the tension-pin, and the valvejand its stem carried by the piston and controlling the admission of the eX- plosive charge and actuated by the cam-plate.

2. In a motor of the class described, the combination with a crank-shaft, of a rod having an endwise movement therein and a beveled end,

a hand-lever for actuating said rod, a governorweight having a sliding movement on the crank part of said shaft and carrying a segmental cam-plate, a tension-pin loosely inserted between the weight and cam-plate, and in position to be engaged by the beveled end of the rod, a spring mounted on the tension-pin, a valve-rod having a valve mounted on the upper end thereof, the lower end being positioned to be periodically contacted by said cam-plate, substantially as set forth.

In testimony whereof we aiiix our signatures in presence of two witnesses.

ALBERT BUCHNER. ELMER P. MCCLURE. Vitnesses:

L. M. FREEMAN, L. B.v CoUrLAND. 

